Blade Ff 2The BLADE FF 2 indoor shoe is a lightweight indoor shoe that helps you move faster. This shoe is updated with a higher heel drop that positions your foot in a in a start up position for moving forward more quickly. The PRECISION SOLE design uses a 3D modeling application to generate the new outsole pattern, achieving a balance of flexibility, lightweight, and grip; combined with the X GUIDANCE technology in the flex grooves to provide extra